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Primary Inoculum of Strawberry Anthracnose in Nursing Field

육묘상에서 딸기탄저병의 1차전염원

  • Published : 2002.12.01

Abstract

This experiment was carried out to investigate the primary inoculum of strawberry anthracnose in nursery field. The pathogen, Colletotrichum gloeosporioides was not detected in soil and weeds of nursery field but symptom of anthracnose was developed in mother plants collected from market after incubation in humid chamber, The symptom of anthracnose was expressed in the strawberry plant that reserved for 17 days in field after inoculation by spore suspension but was not observed there after. When inoculated leaves were observed by SEM, only appressoria were observed 7 days after inoculation. So, it is guessed that dissemination of Colletotrichum sp. into nursery held will be by contamination of mother plants, and diagnosis by naked eyes may be impossible because symptom will be not developed if environment is to be adequate to penetration and in case of imperfect penetration after germination, the pathogen remains appressorium to achieve penetration.

딸기육묘시 발생하는 탄저병의 1차 전염원을 밝히기 위해 본 시험을 수행한 결과, 육묘포의 토양과 주변 잡초중에는 탄저병균이 검출되지 않았으나 외관상 건전한 딸기의 모주를 습실처리하였을 경우에는 탄저병균이 검출되었다. 딸기묘에 탄저병균의 포자현탁액을 분무접종하였을때 발병은 되지 않았지만 습실처리하였을 경우, 접종 17일 후까지 발병이 되었고, 포자현탁액을 분무접종한 딸기잎을 주사전자현미경으로 관찰하였을 때 접종 7일 후 부착기만 관찰되었다 그러므로 딸기 탄저병은 육묘상에서 딸기 모주를 통해 전염이 되고, 탄저병균의 포자가 모주에 부착되어 있더라도 부적당한 환경조건에 의해 발병되지 않아 육안으로 판별이 불가능하며, 발아가 되었으나 침입이 완전히 이루어지지 않은 경우 부착기로 남아 침입을 시도하는 것으로 생각된다.

Keywords

References

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